What is an MP3? - PowerPoint PPT Presentation

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MP3: MP3 is an acronym for MPEG-1 or MPEG-2 audio layer 3. MP3 is the file extension for MPEGaudio layer 3. Layer 3 is one of three coding schemes (layer 1, layer 2 and layer 3) for the compression of audio signals. Layer 3 uses perceptual audio coding and psychoacoustic compression to remove all superfluous information (more specifically, the redundant and irrelevant parts of a sound signal. The stuff the human ear doesn't hear anyway)

This following information is only a guide to on how to operate an MP3 player – each machine will have its own specific features. Before completing actual recordings for your students it may be advisable to spend some time ‘Getting to know the device’ and to make sure you are confident that when you sit with your student that the device will record and save your recordings.

Reference to this site does not imply that CCEA supports the information contained on it and only serves as a guide to assist you in making an informed decision on the type of MP3 you require.

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This is a question and answer from a user’s forum:

I have 500 hours of mp3 files on 8 cds that i want to load onto an mp3 player but I can't figure out what size player I need. I know 1 gig is 16 hours of audio files, but mp3 files are condensed. Right? Someone help please!!!

Answer:

The audio files are already compressed as you said they are in mp3 format. You say they are on 8 cds. They must be highly compressed to fit that much only 8 cds. A cd has 700 MB of storage. You have 8 of them. Do the math and that equals about 5.6 GB. If that's the case, you should probably get something that is at least 8GB. Go with 16GB if you plan on adding more.

Assuming that this could be similar to the ICT eModeration it is likely that you will receive a ‘Pre-entry list of candidates’ file which you will download and update with student/centre information. It could look like this: